.center{
    height: 1400px;
    background-color: rgb(241, 240, 240);
}
.big-title{
    text-align: center;
    font-size: 40px;
    padding-top: 30px;
    padding-bottom: 20px;
}
.two-title{
    text-align: center;
    border-bottom: 1px solid rgb(210, 208, 208);
}
.two-title>span{
    display: inline-block;
    width: 130px;
    height: 40px;
    line-height: 40px;
    text-align: center;
}
a{
    color: black;
    text-decoration: none;
}
.two-title>span:nth-child(1){
    color: rgb(244, 84, 66);
    border-bottom: 3px solid rgb(244, 84, 66);
}
.small-title{
    text-align: center;
}
.small-title>span{
    display: inline-block;
    width: 130px;
    height: 40px;
    line-height: 40px;
    text-align: center;
}
.small-title>span:nth-child(1),.small-title>span:nth-child(3),.small-title>span:nth-child(4){
    color: rgb(138, 137, 137);
}
.box{
    width: 70%;
    height: 1400px;
    background-color: rgb(241, 240, 240);
    margin: 0 15%;
}
.small-box{
    width: 230px;
    height: 280px;
    background-color: aliceblue;
    float: left; 
    margin-left: 40px;   
    margin-bottom: 20px;
}
.small-box:nth-child(1),.small-box:nth-child(5),.small-box:nth-child(9),.small-box:nth-child(13){
    margin-left: 15px;
}
.small-box>p{
    margin: 5px 10px;
    text-align: center;
}
.number>span{
    display: inline-block;
    width: 40px;
    height: 20px;
    text-align: center;
    line-height: 20px;
    border: 1px solid rgb(138, 137, 137);
    font-size: 14px;
    color: rgb(138, 137, 137);
    margin: 5px;
}
.time{
    color: rgb(244, 84, 66);
}
.num{
    font-size: 14px;
    color: rgb(138, 137, 137);
}